GlossaryANTONYM: a word that is opposite in meaning to another word.
COLLOCATION: a specialized dictionary which shows arrangements of words in sentences.
DERIVATION: In a dictionary, the derivation is the section which shows the origin and historical development of a word. It is useful for gaining a full understanding of a word.
ESL: Abbreviation for "English as a Second Language". Refers to the field of teaching English to non-English speakers.
ETYMOLOGY: the origin and development of a word; the tracing of a word or other form back as far as possible in its own language and to its source in contemporary or earlier languages.
IDIOM: A way in which the words of a particular language are joined together to express a thought. Usually, the meaning of an idiom is not equivalent to the sum of the meanings of the individual words. For example, the idiom "every dog has his day" means "something good or lucky happens to everyone at one time or another". Being able to find these specialized meanings of a word is very important to fully understanding the English language.
SYNONYM: a word having the same or nearly the same meaning in one or more senses as another in the same language: opposed to antonym.
THESAURUS: A book containing a store of words; specifically, a book of synonyms and antonyms.
TOEFL and TOEIC: The TOEFL (Test of English as a Foreign Language) and TOEIC (Test of English for International Communication) tests are widely used to evaluate the English proficiency of people whose native language is not English. TOEFL and TOEIC are registered trademarks of Educational Testing Service.